Abstract: A blade assembly for an earthworking implement has a set of teeth that are independently slideable within guides. The teeth slide to conform to an undulating surface and permit scraping of the surface.

Abstract: A method and apparatus for generating customizable documents comprising a datafile including a data structure for defining relationships between elements of a document and variations thereof. A parser for reading the datafile and for creating instances of document-class data structures in accordance with general document class definitions. A user interface for inputting purpose parameters specifying a document variation and a selection engine for utilizing the current values of the purpose parameters for generating customized versions of the document.

Abstract: This invention relates to a method for generating a shared secret value between entities in a data communication system, one or more of the entities having a plurality of members for participation in the communication system, each member having a long term private key and a corresponding long term public key. The method comprises the steps of generating a short term private and a corresponding short term public key for each of the members; exchanging short term public keys of the members within an entity. For each member then computing an intra-entity shared key by mathematically combining the short term public keys of each the members computing an intra-entity public key by mathematically combining its short-term private key, the long term private key and the intra-entity shared key.